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PDF ( 数据手册 , 数据表 ) VL-486-3

零件编号 VL-486-3
描述 486SXLC Single Board Industrial Computer
制造商 VERSALOGIC
LOGO VERSALOGIC LOGO 


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VL-486-3 数据手册, 描述, 功能
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VL-486-3 pdf, 数据表
Introduction
ON-BOARD MEMORY
RAM Four 42-pin SOJ JEDEC compatible sockets accept up to four 1M x 16 dynamic RAM chips
to provide a total of 2M, 4M, 6M or 8M of 16-bit system memory. The use of 1M x 18 RAM
chips will provide parity error detection if desired.
ROM Two 32-pin PLCC JEDEC compatible sockets accept one or two high density memory
components including 128K x 8, 256K x 8, and 512K x 8 EPROMs and Flash EPROMs. You can
start out with one device, and add a second one when your storage requirements grow. A Flash
File System is available to make the Flash device(s) appear as a bootable disk drive.
HARD DISK DRIVE AND FLOPPY DISK DRIVE INTERFACES
A 40-pin IDE hard disk drive interface and a 34-pin floppy disk drive interface are included on
the VL-486-3 card for connection to industry standard IDE hard drive(s) and PC/AT style floppy
drive(s) (5¼” or 3½”). Each interface supports two drives.
COM PORTS
The two on-board COM ports are hardware and software compatible with the PC/AT
architecture. Baud rates are programmable from 50 baud to 115K baud. COM1 is a standard RS-
232 interface, COM2 can be jumpered as an RS-232 or RS-485 port.
PARALLEL PORT
The bidirectional parallel port can be used as a standard PS2 compatible LPT port or as 17
general purpose TTL I/O signals. Each output line has a 24 ma current sink rating. Eight of the
signals are programmable as a group for input or output, three are dedicated output, and five are
dedicated inputs. A strobe signal, which produces a 50 µs pulse under program control, is also
available as an output.
COUNTERS/TIMERS
The VL-486-3 card includes three 8254 type 16-bit counter/timers. One channel provides timing
for dynamic RAM refresh, one channel generates an 18.2 ms DOS interrupt, and another channel
is used to drive the speaker. All channels are available for general purpose timing and periodic
interrupt sources if they are not being used by an operating system.
The counter/timers are provided by the 82C836 Integrated Peripherals Controller chip.
REAL TIME CLOCK WITH CMOS RAM
A battery-backed 146818 compatible real time clock (RTC) provides accurate date and time
functions. This PC/AT compatible RTC also contains 128 bytes of battery-backed CMOS RAM
with 114 bytes available as a system resource to store standard DOS setup parameters. Normally,
DOS requires 51 bytes, leaving 63 bytes for general purpose use.
2 – Overview
VL-486-3 Reference Manual







VL-486-3 equivalent, schematic
Cable Installation
Cable Installation
To bring the header connectors on the VL-486-3 CPU card out to standard PC/AT style pinouts,
the VersaLogic cable assemblies listed below are required.
Connector
Part #
J1 COM1
9575
or 9551
J2 IDE
J3 LPT1
J4 COM2
J5 FDC
J6 IRQ
J7 DMA
L1 Speaker
9578
9576
9575
9577
N/A
N/A
N/A
Table 2: Cable Assemblies.
Description
1 ft. 10-pin IDC to DB-9P
6 ft. 10-pin IDC to DB-25S
(Null Modem)
3 in. 40-pin IDC to 40-pin IDC
1 ft. 20-pin IDC to DB-25S
1 ft. 10-pin IDC to DB-9S
8 in. 34-pin IDC to 34-pin IDC
Connects to:
External equipment (e.g., modem)
DTE device (e.g., host PC)
IDE hard disk drive
External printer
External equipment (e.g., modem)
Floppy disk drive
Miscellaneous user circuitry
Miscellaneous user circuitry
External 8speaker
CMOS RAM Setup
The VL-486-3 CPU card uses battery-backed, non-volatile CMOS RAM provided by the real
time clock chip to store system configuration settings. You can change these system settings with
the Setup program (accessed manually at system boot.) The configuration information is read by
the CPU upon system reset.
The Setup program is permanently stored in ROM, and can be run with or without an operating
system present. To run Setup, reset the CPU card and press the DEL key when prompted.
Select “BASIC CMOS CONFIGURATION” to display a summary of the information stored in
the CMOS RAM. To change the values shown you must enter new information. Use the cursor
keys to move the highlight bar to the desired entry field, the press the or + keys to change the
values.
When you are finished, exit to the main Setup menu and select “WRITE TO CMOS AND
EXIT” to save the changes and exit the Setup program.
10 – DOS Based Quick Start
VL-486-3 Reference Manual










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